| /* |
| * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6362557 |
| * @summary Some tests of add(BigDecimal, mc) |
| * @author Joseph D. Darcy |
| */ |
| |
| import java.math.*; |
| import static java.math.BigDecimal.*; |
| import java.util.Set; |
| import java.util.EnumSet; |
| |
| public class AddTests { |
| |
| private static Set<RoundingMode> nonExactRoundingModes = |
| EnumSet.complementOf(EnumSet.of(RoundingMode.UNNECESSARY)); |
| |
| /** |
| * Test for some simple additions, particularly, it will test |
| * the overflow case. |
| */ |
| private static int simpleTests() { |
| int failures = 0; |
| |
| BigDecimal[] bd1 = { |
| new BigDecimal(new BigInteger("7812404666936930160"), 11), |
| new BigDecimal(new BigInteger("7812404666936930160"), 12), |
| new BigDecimal(new BigInteger("7812404666936930160"), 13), |
| }; |
| BigDecimal bd2 = new BigDecimal(new BigInteger("2790000"), 1); |
| BigDecimal[] expectedResult = { |
| new BigDecimal("78403046.66936930160"), |
| new BigDecimal("8091404.666936930160"), |
| new BigDecimal("1060240.4666936930160"), |
| }; |
| for (int i = 0; i < bd1.length; i++) { |
| if (!bd1[i].add(bd2).equals(expectedResult[i])) |
| failures++; |
| } |
| return failures; |
| } |
| |
| /** |
| * Test for extreme value of scale and rounding precision that |
| * could cause integer overflow in right-shift-into-sticky-bit |
| * computations. |
| */ |
| private static int extremaTests() { |
| int failures = 0; |
| |
| failures += addWithoutException(valueOf(1, -Integer.MAX_VALUE), |
| valueOf(2, Integer.MAX_VALUE), null); |
| failures += addWithoutException(valueOf(1, -Integer.MAX_VALUE), |
| valueOf(-2, Integer.MAX_VALUE), null); |
| return failures; |
| } |
| |
| /** |
| * Print sum of b1 and b2; correct result will not throw an |
| * exception. |
| */ |
| private static int addWithoutException(BigDecimal b1, BigDecimal b2, MathContext mc) { |
| if (mc == null) |
| mc = new MathContext(2, RoundingMode.DOWN); |
| |
| try { |
| BigDecimal sum = b1.add(b2, mc); |
| printAddition(b1, b2, sum.toString()); |
| return 0; |
| } catch(ArithmeticException ae) { |
| printAddition(b1, b2, "Exception!"); |
| return 1; |
| } |
| } |
| |
| /** |
| * Test combinations of operands that may meet the condensation |
| * criteria when rounded to different precisions. |
| */ |
| private static int roundingGradationTests() { |
| int failures = 0; |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal( "1234e97")); |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal( "1234e96")); |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal( "1234e95")); |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal( "1234e94")); |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal( "1234e93")); |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal( "1234e92")); |
| |
| failures += roundAway(new BigDecimal("1234e100"), |
| new BigDecimal("1234e50")); |
| |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal( "1234e97")); |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal( "1234e96")); |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal( "1234e95")); |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal( "1234e94")); |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal( "1234e93")); |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal( "1234e92")); |
| |
| failures += roundAway(new BigDecimal("1000e100"), |
| new BigDecimal("1234e50")); |
| |
| |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal( "1234e97")); |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal( "1234e96")); |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal( "1234e95")); |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal( "1234e94")); |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal( "1234e93")); |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal( "1234e92")); |
| |
| failures += roundAway(new BigDecimal("1999e100"), |
| new BigDecimal("1234e50")); |
| |
| |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal( "1234e97")); |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal( "1234e96")); |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal( "1234e95")); |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal( "1234e94")); |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal( "1234e93")); |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal( "1234e92")); |
| |
| failures += roundAway(new BigDecimal("9999e100"), |
| new BigDecimal("1234e50")); |
| |
| return failures; |
| } |
| |
| private static void printAddition(BigDecimal b1, BigDecimal b2, String s) { |
| System.out.println("" + b1+ "\t+\t" + b2 + "\t=\t" + s); |
| } |
| |
| private static int roundAway(BigDecimal b1, BigDecimal b2) { |
| int failures = 0; |
| |
| b1.precision(); |
| b2.precision(); |
| |
| BigDecimal b1_negate = b1.negate(); |
| BigDecimal b2_negate = b2.negate(); |
| |
| b1_negate.precision(); |
| b2_negate.precision(); |
| |
| failures += roundAway1(b1, b2); |
| failures += roundAway1(b1, b2_negate); |
| failures += roundAway1(b1_negate, b2); |
| failures += roundAway1(b1_negate, b2_negate); |
| |
| return failures; |
| } |
| |
| private static int roundAway1(BigDecimal b1, BigDecimal b2) { |
| int failures = 0; |
| failures += roundAway0(b1, b2); |
| failures += roundAway0(b2, b1); |
| return failures; |
| } |
| |
| /** |
| * Compare b1.add(b2, mc) with b1.add(b2).round(mc) for a variety |
| * of MathContexts. |
| */ |
| private static int roundAway0(BigDecimal b1, BigDecimal b2) { |
| int failures = 0; |
| BigDecimal exactSum = b1.add(b2); |
| |
| for(int precision = 1 ; precision < exactSum.precision()+2; precision++) { |
| for(RoundingMode rm : nonExactRoundingModes) { |
| MathContext mc = new MathContext(precision, rm); |
| BigDecimal roundedExactSum = exactSum.round(mc); |
| |
| try { |
| BigDecimal sum = b1.add(b2, mc); |
| |
| if (!roundedExactSum.equals(sum) ) { |
| failures++; |
| System.out.println("Exact sum " + exactSum + |
| "\trounded by " + mc + |
| "\texpected: " + roundedExactSum + " got: "); |
| printAddition(b1, b2, sum.toString()); |
| } |
| // else { |
| // System.out.print(mc + "\t"); |
| // printAddition(b1, b2, sum.toString()); |
| // } |
| |
| } catch (ArithmeticException ae) { |
| printAddition(b1, b2, "Exception!"); |
| failures++; |
| } |
| } |
| } |
| |
| return failures; |
| } |
| |
| /** |
| * Verify calling the precision method should not change the |
| * computed result. |
| */ |
| private static int precisionConsistencyTest() { |
| int failures = 0; |
| MathContext mc = new MathContext(1,RoundingMode.DOWN); |
| BigDecimal a = BigDecimal.valueOf(1999, -1); //value is equivalent to 19990 |
| |
| BigDecimal sum1 = a.add(BigDecimal.ONE, mc); |
| a.precision(); |
| BigDecimal sum2 = a.add(BigDecimal.ONE, mc); |
| |
| if (!sum1.equals(sum2)) { |
| failures ++; |
| System.out.println("Unequal sums after calling precision!"); |
| System.out.print("Before:\t"); |
| printAddition(a, BigDecimal.ONE, sum1.toString()); |
| |
| System.out.print("After:\t"); |
| printAddition(a, BigDecimal.ONE, sum2.toString()); |
| } |
| |
| return failures; |
| } |
| |
| public static void main(String argv[]) { |
| int failures = 0; |
| |
| failures += extremaTests(); |
| failures += roundingGradationTests(); |
| failures += precisionConsistencyTest(); |
| |
| if (failures > 0) { |
| throw new RuntimeException("Incurred " + failures + |
| " failures while testing rounding add."); |
| } |
| } |
| } |